1
chalkboard
2
chalk
3
eraser
4
teacher
5
student
6
chair
7
book
8
desk
9
paper
10
pen
11
pencil
12
notebooks
13
computer
14
stand
15
sit
16
talk
17
raise...hand
18
open a notebook
19
close window
20
look at the screen
21
work at the computer
22
listen
23
read
24
come in
25
go out
26
point to
27
write